Chiyambire chiwonetsero chake mu 1996, wobzala Chengfei nthawi zonse amakhala ndi ubale wokhala ndi mgwirizano wachilengedwe, akupereka kwa anthu wamba, komanso chitukuko chokhazikika. Ngakhale kuti mukuyang'ana pakupanga zinthu zobiriwira zobiriwira zomwe zingabweretse phindu lalikulu kwa makasitomala, tinkachitanso zochitika zingapo kuti tibwerere kwa otsika-carbon.